question_answer

Which one of the following statements is true of flow around a submerged body?

A) For subsonic, non-viscous flow, the drag is zero

B) For supersonic flow the drag coefficient is dependent equally on Mach number and Reynolds number

C) The lift and drag coefficient of an aerofoil is independent of Reynolds number              

D) For incompressible flow around an aerofoil, the profile drag is the sum of form drag and skin Friction drag.